12222123111 has 48 divisors (see below), whose sum is σ = 20437297920. Its totient is φ = 6965122560.

The previous prime is 12222123107. The next prime is 12222123119. The reversal of 12222123111 is 11132122221.

It is not a de Polignac number, because 12222123111 - 2² = 12222123107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222123119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88855 + ... + 179831.

It is an arithmetic number, because the mean of its divisors is an integer number (425777040).

Almost surely, 2^12222123111 is an apocalyptic number.

12222123111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12222123111 is a deficient number, since it is larger than the sum of its proper divisors (8215174809).

12222123111 is a wasteful number, since it uses less digits than its factorization.

12222123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91076 (or 91073 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 12222123111 its reverse (11132122221), we get a palindrome (23354245332).

The spelling of 12222123111 in words is "twelve billion, two hundred twenty-two million, one hundred twenty-three thousand, one hundred eleven".